— What do you mean saying “The boy is overgrowing”? — I mean that he is tall his age.A. ab

问题补充：

— What do you mean saying “The boy is overgrowing”?

— I mean that he is tall his age.

A. about; with

B. as to; for

C. by; for

D. by; to

答案：

A. about; with

B. as to; for

(答案→)C. by; for

D. by; to

解析：考察介词。What do you mean by…?你这样说是什么意思？for his age对他这个年龄来说。句意：—你说这个男孩长的太快是什么意思？—我的意思是对于他的年龄来说他太高了。